反应详情

温度

60 °C

6-Nitrobenzothiazol-2-yl tert-butyl carbamate (4.68 g, 15.8 mmol) was dissolved in dimethylformamide (120 mL) and palladium on charcoal (841 mg, 10% Pd, 0.79 mmol Pd) was added. The air was replaced with hydrogen (1 bar) and the mixture was vigorously stirred at 60° C. until completion of the reaction (2 h). The palladium was removed by filtration through a pad of celite and the solution was concentrated to 20 mL. Water (200 mL) was added. After stirring for 1 h, the precipitated 6-aminobenzothiazol-2-yl tert-butyl carbamate was filtered off and washed with water. Additional product was obtained by repeated filtration of the mother liquor. A total of 3.24 g (12.2 mmol, 77%) of a grey solid was obtained. LC/ESI-MS: m/z=266 [M+H]+; m/z=264 [M−H]−; Rt=2.54 min.

1. customThe palladium was removed by filtration through a pad of celite
2. concentrationthe solution was concentrated to 20 mL
3. additionWater (200 mL) was added
4. stirringAfter stirring for 1 h
5. filtrationthe precipitated 6-aminobenzothiazol-2-yl tert-butyl carbamate was filtered off
6. washwashed with water
7. customAdditional product was obtained
8. filtrationfiltration of the mother liquor